Method for preparing carbon-carbon cover plate for polycrystalline silicon ingot furnace

A technology of polysilicon ingot casting furnace and carbon-carbon cover plate, which is applied to the growth of polycrystalline materials, chemical instruments and methods, crystal growth, etc., can solve the problems of long production cycle, high cost, low cost performance, etc., and achieve production cost reduction, Long service life and good flatness

Inactive Publication Date: 2018-05-18
AEROSPACE RUITIAN CARBON MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the densification of its plates is mainly through the deposition process, whic

Method used

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  • Method for preparing carbon-carbon cover plate for polycrystalline silicon ingot furnace

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Embodiment 1

[0030] Embodiment 1 A method for preparing a carbon-carbon cover plate for a polysilicon ingot furnace, comprising the following steps:

[0031] (1) Weave carbon fiber into two-way carbon cloth, the two-way carbon cloth uses 12k carbon fiber, and the surface density of carbon cloth is 360g / m 2 ;

[0032] (2) Perform high-temperature pretreatment on the bidirectional carbon cloth to improve the surface activity of the carbon fiber. The high-temperature pretreatment temperature is 2000°C and the temperature is kept for 2 hours;

[0033] (3) Prepare the pretreated bidirectional carbon cloth into a phenolic resin prepreg, in which the resin content is 40%, the insoluble resin content is 5%, and the volatile matter content is 5%. The resins are aminophenolic resin and barium phenolic resin , one or more of boron phenolic resins, and the insoluble resin is one or more of amino phenolic resins, barium phenolic resins, and boron phenolic resins.

[0034] (4) Widen the tow of the pre...

Embodiment 2

[0042] Example 2 A method for preparing a carbon-carbon cover plate for a polysilicon ingot furnace, comprising the following steps:

[0043] (1) Weave carbon fiber into two-way carbon cloth, the two-way carbon cloth uses 12k carbon fiber, and the surface density of carbon cloth is 450g / m 2 ;

[0044] (2) Perform high-temperature pretreatment on the bidirectional carbon cloth to improve the surface activity of the carbon fiber. The high-temperature pretreatment temperature is 1800°C and the temperature is kept for 1 hour;

[0045] (3) Prepare the pretreated bidirectional carbon cloth into a phenolic resin prepreg, in which the resin content is 44%, the insoluble resin content is 4%, and the volatile matter content is 6%. The resin is aminophenolic resin, barium phenolic resin, One or more of boron phenolic resins, and the insoluble resin is one or more of amino phenolic resins, barium phenolic resins, and boron phenolic resins.

[0046] (4) Widen the tow of the prepreg carbo...

Embodiment 3

[0054] Embodiment 3 A method for preparing a carbon-carbon cover plate for a polysilicon ingot furnace, comprising the following steps:

[0055] (1) Weave carbon fiber into two-way carbon cloth, the two-way carbon cloth uses 12k carbon fiber, and the surface density of carbon cloth is 400g / m 2 ;

[0056] (2) Perform high-temperature pretreatment on the bidirectional carbon cloth to improve the surface activity of the carbon fiber. The high-temperature pretreatment temperature is 1500°C and the temperature is kept for 4 hours;

[0057] (3) Prepare the pretreated bidirectional carbon cloth into a phenolic resin prepreg, in which the resin content is 42%, the insoluble resin content is 2%, and the volatile matter content is 8%. The resin is aminophenolic resin, barium phenolic resin, One or more of boron phenolic resins, the insoluble resin is one or more of amino phenolic resins, barium phenolic resins, boron phenolic resins;

[0058] (4) Widen the tow of the prepreg carbon cl...

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Abstract

The invention discloses a method for preparing a carbon-carbon cover plate for a polycrystalline silicon ingot furnace. The method comprises the following steps: 1, weaving a carbon fiber into bidirectional carbon cloth; 2, performing high-temperature pretreatment on the bidirectional carbon cloth so as to obtain the surface activity of the carbon fiber; 3, preparing phenolic resin prepreg from the pretreated bidirectional carbon cloth; 4, spreading the prepreg carbon cloth by using an extrusion method; 5, paving the prepreg carbon cloth, and performing hot-pressing curing molding so as to obtain a resin-based mold pressing plate; 6, performing carbonization treatment; 7, thickening by using a resin soaking-carbonization process; 8, performing graphitization treatment; 9, treating a surface coating; 10, performing mechanical processing. Compared with the prior art, the carbon-carbon cover plate has the characteristics of being high in cover plate product interlayer strength, high in fiber content, good in flatness, long in service life and the like, the rigid of a cover plate product is greatly improved, the problem that a plate is deformed when being used is effectively alleviated, the surface performance and the silicon liquid corrosion and damage resistance of the plate is improved, and the production cost is low.

Description

technical field [0001] The invention belongs to the technical field of curing equipment, and in particular relates to a preparation method of a carbon-carbon cover plate for a polycrystalline silicon ingot furnace. Background technique [0002] The carbon / carbon cover plate is one of the main thermal field consumption parts of the polysilicon ingot furnace. The plate structure puts forward higher requirements. In the current technical environment, the widely used cover structures include three-dimensional needle-punched structures and two-dimensional laminated structures (ie, 2D sheets). Both have their own characteristics. The needle-punched structure cover plate has good integrity and no deformation problem, but there is a defect that it is prone to fracture due to silicon vapor erosion; the two-dimensional laminated structure cover plate has high strength and no fracture problem, but there are deformation and layer defects. layering problem. [0003] In order to adapt ...

Claims

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Application Information

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IPC IPC(8): C04B35/84C01B32/205C30B29/06C30B28/06
CPCC04B35/83C30B28/06C30B29/06
Inventor 姜召阳于洪刚陈小飞罗昆鹏张贵歧高晓佳曹磊王春梅崔树永
Owner AEROSPACE RUITIAN CARBON MATERIALS CO LTD
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